A.
An arrival date of 11,000 years ago is a acceptable for the purpose of her lecture
B.
An arrival date of 11,000 years ago is inconsistent with some aspects of Clovis culture
C.
Only a few archaeologists believe the arrival date is much earlier than 11,000 years ago
D.
The debate about the arrival date of the Clovis people has recently been settled
正确答案:A